Class 9 Math – Exercise 1.3 | Set Notation and Forms | Fully Solved
Welcome to Smart Study Notes! Here you’ll find complete solutions to Class 9 Math Exercise 1.3 with simple explanations in Urdu and English. This exercise covers different forms of set representation.
📘 Topics Included:
- Tabular Form (فہرستی شکل)
- Descriptive Form (تفصیلی شکل)
- Set Builder Notation
- Element Checking using ∈ and ∉
📗 Sample Question:
Q1: Write the set A = {x : x is an even number less than 10} in tabular form. Solution:A = {2, 4, 6, 8} ---
📘 Urdu Explanation:
Tabular Form میں ہم عناصر (elements) کو comma کے ساتھ curly brackets میں لکھتے ہیں، جیسے:
A = {1, 2, 3}
Descriptive Form میں ہم الفاظ کے ذریعے Set کو بیان کرتے ہیں، جیسے:
A = وہ تمام عدد جو 5 سے کم ہیں۔
Set Builder Form:
A = {x : x ∈ N, x < 5}
🧠 Note:
اگر سوال میں "Write in set-builder form" کہا جائے تو یہ format use کریں: {x : x ∈ N, condition}
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